FOREST GEOGRAPHY AND ARCHAEOLOGY. 219 



could be most simply exhibited, by the addition of two or 

 three similar ones. Two would serve, one for Europe, the 

 other for northeast Asia. A third would be the Himalay- 

 Altaian region, geographically intermediate between the other 

 two, as the Arizona-Rocky Mountain district is intermediate 

 between our eastern and western. Both are here left out of 

 view, partly for the same, partly for special reasons pertaining 



1 2 



1. Atlantic American Forest. 



2. Pacific American Forest. 



3. Japan-Mandchurian Forest. 



4. European Forest. 



to each, which I must not stop to explain. These four marked 

 specimens will simply and clearly exhibit the general facts. 



Keeping as nearly as possible to the same scale, we may 

 count the indigenous forest trees of all Europe at thirty-three 

 genera and eighty-five species ; and those of the Japan-Mand- 

 churian region, of very much smaller geographical area, at 

 sixty-six genera and one hundred and sixty-eight species. I 

 here include in it only Japan, eastern Mandchuria, and the 

 adjacent borders of China. The known species of trees must 

 be rather roughly determined ; but the numbers here given 

 are not exaggerated, and are much more likely to be sensibly 



